Getting your Crest Whitestrips to stay is easy when you know a couple tricks. Wear the upper and lower strips separately. Use a mirror to properly apply the strips making sure the strip is in good contact with the teeth. Don't touch the strips excessively with your tongue. Finally, you can try gently tucking the strip in the spaces between your teeth with your fingernail, then folding it behind your teeth. If you have any other questions, or if we can help you further, please let us know by calling (800) 395-8423.

Hi. I am sorry the Crest 3D Whitestrips didn't work well for you. I am sure this was very frustrating and I am glad you have taken this opportunity to share your feedback with us. We would like to learn more about your experience with the whitestrips, so please call us at (800) 607-5514, M-F, 9 am to 6 pm, EST.